Kinetics

[Renee Grange 1I]

What is the difference between kinetically and thermodynamically controlled?

[Tauhid Islam- 1H]

From my understanding, a reaction is determined by either the thermodynamic properties of the products or the kinetic factors or the rate of product formation. When the temperate is low, there is only enough energy to get past a small activation energy barrier until the reaction proceeds to the right to form the products, on the other hand, when the temperature is high, the reactants can get past a higher activation energy barrier, therefore molecules that are more stable (less energy) can be formed. If a reaction is kinetically controlled, that means generally, the temperature is low so the reaction is not controlled by thermodynamic properties but by the kinetics or by the rate of products that can be formed. On the other hand, if a reaction is thermodynamically controlled, the reaction is controlled by the thermodynamic properties of the reaction, and that dictation generally happens at higher temperatures.

[Bella Townsend]

In general short reactions favor kinetic control, while long reactions favor thermodynamic control.

[Kandyce Lance 3E]

In general short reactions favor kinetic control, while long reactions favor thermodynamic control.

This is really helpfull and straightforward thank you!!

[alebenavides]

kinetic controlled is for short reations and thermodynamically is for long reactions

[DMaya_2G]

Kinetic controlled is for short reactions. In contrast, thermodynamically is for long reactions.

[Trevor_Ramsey_3H]

Can someone explain what kinetic controlled and thermodynamically controlled means?

[Ximeng Guo 2K]

I found this clarification on the internet:

Thermodynamics describes the overall properties, behavior, and equilibrium composition of a system; kinetics describes the rate at which a particular process will occur and the pathway by which it will occur.

So for thermodynamics we are interested in the start and end states in a reaction, while for kinetics we look at the exact path taken by the reaction?

[Justin Nguyen 3E]

I think that a kinetically controlled reaction is one where there the least activation energy is required to power it, whereas a thermodynamically controlled reaction is when the product is formed because it possesses the lowest free energy. The diagram (figure 14.3.1) on this site really helped me understand the difference

https://chem.libretexts.org/Courses/Ath ... _Reactions

[Adam Bustamante 1I]

a shorter reaction is controlled by kinetics whereas thermodynamics control longer reactions, such as